Question

if 2(n-6)× 5(n-3)=125, the value of n.​

Answer 1

Step-by-step explanation:

10×(n-6)×(n-3)=125

10×(n^2 - 3n - 6n +18) =125

10×(n^2 - 9n - 18) =125

10n^2 - 90n - 180 - 125=0

10n^2 - 90n - 305=0

By formula

$- ( - 90) + \sqrt{90 {}^{2} - 4(10)( - 305)}\div 2 \times 10$

$90 + \sqrt{8100 + 122000} \div 20$

90+360.7/20= 22.35 or 90-360.7/20 = 13.53

So 22.35 or 13.53